Volvo Temperature Sensor 3985651

Quality Assurance One-Year Minimal
Weight 87 g
Packaging Customization Available
Number of pins 2

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OE Number Reference
Replaces Ref. no.
Volvo 3985651
ZG ZG.21101-0008
Used in Vehicles
Brand Model
Volvo FH FH12 1998-2001 1998 - 2001
Volvo FM FM12 1998-2001 1998 - 2001, FM12 2001-2005 2001 - 2005
Volvo NH NH12 1997-2008 1997 - 2008

Premium Temperature Sensor for Volvo FH / FM / NH Series (OE 3985651)

Ensure your Volvo truck operates at peak thermal efficiency with our industrial-grade Temperature Sensor. Specifically designed for the 12-liter engine platforms, this sensor provides critical temperature data to the Engine Control Unit (ECU), preventing overheating and ensuring optimal fuel combustion.

As an established sensor manufacturer, we utilize high-sensitivity NTC (Negative Temperature Coefficient) technology housed in a corrosion-resistant casing. This ensures that even in the most demanding long-haul environments, your engine’s vitals remain accurately monitored.

Key Performance Features

  • OEM Compatibility: A direct 1:1 replacement for Volvo OE 3985651, ensuring no modification is required for installation.

  • Superior Durability: Engineered to withstand the high-vibration environment of Volvo D12 engines.

  • Thermal Accuracy: High-precision thermistor ensures a rapid response to temperature fluctuations.

  • Leak-Proof Design: Precision-machined threads and high-quality seals prevent coolant or oil leaks.


Vehicle Application Guide

This sensor is a critical component for the following Volvo Trucks:

  • Volvo FH Series: * FH12 (1998 – 2001)

  • Volvo FM Series: * FM12 (1998 – 2001)

    • FM12 (2001 – 2005)

  • Volvo NH Series: * NH12 (1997 – 2008)


Cross-Reference & OE Part Numbers

This product is fully interchangeable with the following reference numbers:

  • Volvo: 3985651

  • ZG: ZG.21101-0008


Technical Specifications

  • Product Name: Coolant / Oil Temperature Sensor

  • Housing Material: High-Grade Brass

  • Thread Type: Standard Fit for Volvo 12L Engines

  • Connector Type: 2-Pin Professional Interface

  • Operating Temperature: -40°C to +130°C